HLSL help

[karlis]

hey, as i needed it for my IVhud resource, i learned a basics of HLSL, and made a simple pixel shader to draw texture in circular shape, however shader somewhy fail to start(returns false when trying to create shader).

is it problem of hardware, or theres some errors?

.fx script:

  
int radius; 
int2 centerPos; 
float4 borderCol; 
texture theMap; 
sampler2D theMapSampler = sampler_state { 
    Texture = (theMap); 
    MinFilter = Anisotropic; 
    MagFilter = Anisotropic; 
    AddressU = Border; 
    AddressV = Border; 
    BorderColor = borderCol; 
} 
  
float4 PixelShaderFunction( float2 texCord : TEXCOORD0, int2 pixelPos : VPOS0 ) : COLOR0 
{ 
    float4 newColor 
    newColor = tex2D(theMapSampler,texCord); 
    if (distance(pixelPos,centerPos)>radius) 
        newColor.a = 0; 
    return newColor; 
} 
  
technique circularDraw 
{ 
    pass Pass1 
    { 
        AlphaBlendEnable = TRUE; 
        DestBlend = INVSRCALPHA; 
        SrcBlend = SRCALPHA; 
        PixelShader = compile ps_2_0 PixelShaderFunction(); 
    } 
} 

the cut from main script, with all the values etc:

  
local mapBorderCol={0,255,120,255} 
local texture=dxCreateTexture("images/radar.jpg") 
local shader=dxCreateShader("shader.fx") 
dxSetShaderValue(shader,"radius",size) --size is radius of the drawing, it IS defined 
dxSetShaderValue(shader,"centerPos",x,y) --x,y is center of drawing, it IS defined 
dxSetShaderValue(shader,"borderCol",mapBorderCol[1]/255,mapBorderCol[2]/255,mapBorderCol[3]/255,mapBorderCol[4]/255) 
dxSetShaderValue(shader,"theMap",texture) 
  

and yes, its in proper nightly 1.1 version.

[karlis]

sorry, i know its noobish to bump, but really theres noone that understands HLSL?

[Jockie]

I see a small typo @ line 17, you've forgot the ; at the end.

[karlis]

oh true, but doesn't work with fix either.

strange that debug script didn't output compile error.

[eAi]

ccw might be the person to deal with this - he may be able to put some more output in to report shaded errors.

[Jockie]

I have also sometimes a strange unknown error:

ID3DXEffectCompiler::CompileEffect: There was an error compiling expression

ID3DXEffectCompiler: Compilation failed

When I just try to compile with Pixel Shader 1.1

EDIT: Have you tried to add VertexShader = null; above to the PixelShader line?

[karlis]

EDIT: Have you tried to add VertexShader = null; above to the PixelShader line?

didn't work.

[Jockie]

@ Line 20 try: newColor.a = 0.0f;

[karlis]

nope, still fails

[karlis]

im intrested about 1st error, whats wrong?

same script

  
int radius; 
int2 centerPos; 
float4 borderCol; 
texture theMap; 
sampler2D theMapSampler = sampler_state { 
    Texture = (theMap); 
    MinFilter = Linear; 
    MagFilter = Linear; 
    AddressU = Border; 
    AddressV = Border; 
    BorderColor = borderCol; 
} 
  
float4 PixelShaderFunction( float2 texCord : TEXCOORD0, int2 pixelPos : VPOS0 ) : COLOR0 
{ 
    float4 newColor = tex2D(theMapSampler,texCord); 
    if (distance(pixelPos,centerPos)>radius) 
    { 
        newColor.a = 0.0f; 
    } 
    return newColor; 
} 
  
technique circularDraw{ 
    pass Pass1 
    { 
        AlphaBlendEnable = TRUE; 
        DestBlend = INVSRCALPHA; 
        SrcBlend = SRCALPHA; 
        VertexShader = null 
        PixelShader = compile ps_2_0 PixelShaderFunction(); 
    } 
} 
  

[50p]

I'm not a shader writer but to me it looks like you're missing ; (line 13 and 31 as well). Remember, it's not Lua, you need to use ;. This is the reason why I use them in my Lua scripts.

[karlis]

I'm not a shader writer but to me it looks like you're missing ; (line 13 and 31 as well). Remember, it's not Lua, you need to use ;. This is the reason why I use them in my Lua scripts.

apparently that was 1 of the reasons, thanks